Meninges, Ventricles, and Cerebrospinal Fluid

Question 1

The outermost layer, _______ ,is dense and tough, providing a durable protective covering.

Answer 1

Dura Mater

Question 2

attached to the skull

Answer 2

periosteal layer

Question 3

closer to the brain

Answer 3

meningeal layer

Question 4

is the middle meningeal layer, lying below the dura
mater.

Answer 4

Arachnoid mater

Question 5

lies beneath it, containing web-like projections
and bridging veins

Answer 5

subarachnoid space

Question 6

The innermost meningeal layer, _______ , is thin and delicate, closely adhering to the brain and spinal cord’s surface.

Answer 6

Pia Mater

Question 7

Primarily produced by the choroid plexus within the ventricles, especially in the lateral and third ventricles.

Answer 7

Cerebrospinal Fluid

Question 8

• Flows from the lateral ventricles into the third ventricle via the foramen
of Monro.

• Moves from the third to the fourth ventricle through the cerebral
aqueduct.

• From the fourth ventricle, CSF enters the subarachnoid space around the
brain and spinal cord via lateral and median apertures

Answer 8

CSF Circulation Pathway

Question 9

• CSF is gradually reabsorbed into the venous bloodstream through
arachnoid granulations into the dural venous sinuses.

• The largest collection points are found in the superior sagittal sinus,
which facilitates continuous CSF flow and renewal.

Answer 9

CSF Absorption